Observational study for improvement of identifying the intervertebral space for indwelling an epidural catheter - Study for better identification of intended intervertebral space in epidural anesthesia

The estimated intervertebral level and the confirmed intervertebral level confirmed perfectly between the 2 groups of the conventional method (group C) and predictive formula usage group (group S) were 32.2% for group C and 32.2% and 54.1% for group S(p = 0.00176). On the other hand, the concordance rate allowed up to +-1 vertebral discrepancy was 98.4% (p = 0.000195) in S group versus 76.3% in C group.